United Kingdom, June 2 -- Rivals star David Tennant has spent his whole life being plagued by "guilt".

The former Doctor Who actor has admitted he's "quite conflict-averse" and spends a lot of his time worrying about whether he's "done the right thing" or "behaved appropriately" and he puts his feelings down to his childhood growing up in Scotland.

When asked what he feels guilty about, he told The Hollywood Reporter: "Everything, absolutely everything. I'm a Scottish Presbyterian. It's my engine.

"Everything is sent to make me feel bad about myself. That's it, really. I don't have any more profound an insight than that.

"Must be partly upbringing and partly psychology. I will often worry that one hasn't done the right thing, behaved ...